Normal resting membrane potential of a neuron is_____________?
Correct answer: C. - 70 mv
- A. - 50 mv
- B. - 60 mv
- C. - 70 mv
- D. - 80 mv
Explanation
A neuron's resting membrane potential is approximately -70 mV because the membrane is more permeable to K+ than Na+ and the Na+-K+ pump maintains unequal ion distributions. Students may choose -60 mV or -80 mV because the exact value varies slightly among cells, but -70 mV is the standard value.
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